Hi! thanks for your reply. I understand you see the grinding on the blood vessel edges counterintuitive. The original idea was to have way more plaque on the edges. But we also wanted the player to make choices within the level. This is why we chose to place the plaque at certain areas instead of all over the edges. We were still convinced that gliding on the edges was a fun game mechanic to gain speed.
The plaque gives a big speed boost. This is why we made it a bit harder to collide with it. But there are routes where you can collide with all of them and get an tremendous amount of speed! This is what you need to get those shiny golden medals on all the tracks! Were you able to get some nice medals?